Circular-saw guard



J. H. BURKE.

CIRCULAR SAW GUARD.

APPLICATION FILED NOV. 10. 1919.

Patented 0on4,- 1921.

* {UNITED SSATAYTES:FVPATENTOFFICE..

HJ'OSIVEPH H. BURKE: or PORTLAND, MAINE-Q CIRCULAR-SAW GUARD.

To all whom it mayconcernk 7 1 Be it known that I, JOSEPH H. BURKE, a

citizen of the United States, residing at Portland, in the countyof'Cumberland and.

State of Maine, have invented certain. new and useful Improvements inCircular-Saw Guards, of which the following is a specification. I Myinvention relates to guards for cirfcular saws and the object of myinvention is to devise a guard that'may be quickly and easily adjusted,that is applied to and removed from the saw and which shall form anefficient protection against accidents.

'To constitute a really effective guard, the device must .be quickly andeasil applied and removed, so that the men will take the time to useitand when removed, itmust be swung out of the way, so as not: tointerfere with the work. r My invention is designed'to fulfil theseconditions. It consists essentially of a post depending from a point ofsupport overhead and at one side of the saw with a hood for protectingthe saw secured to the lower end of a rod, which extends from the saw tothe post and which is clamped to the post and arranged to be. adjustedvertically and to be rotated with respect to the post. The

rod is clamped by a single set screw .and when it v.is in position aportion ofthe rod dropsinto a socket by which it accurately located withrespect to the saw. I

The invention may be best understood by reference to the accompanying.drawing wherein is shown a device constructed in accordance with myinvention. It is to be understood, however, that other forms of theinvention may be constructed which will come within the terms of theinvention as set out in the claims.

In the drawing, r Figure 1 is a front elevation showing a portion of thetable and saw guide in section, on the line 4-4 of Fig. 2,, Fig. 2 is aside elevation partly in section,

Fig. 3 is a section taken on the line 1-1 of Fig. 1,

Fig. t is a section taken on the line 22 of Fig. 1 and,

Fig. 5 is a section taken on the line 3-3 of Fig. 2

Referring to the drawing, 15 represents the saw, 16 the table and 17 thesaw guide.

Specification of Letters Patent. Patented Oct. 4, 1921. Applicationfiled November 10; 919. Serial No. 337,074, i

The guard is held in place by a post 4 depending, from some suitableoverhead support and braced by guys 5.

The hood for protectlng the 'saw is held by arodwhich isso connected tothe post that it may be adjusted vertically and rotated at the sametime. 1

As shown, the post is made in theform of a hollow tube or pipe, thelower end of which is formed into a square socket for a short distancefrom the end. l The rod for supporting the hoodis in tWo parts, theupper one 6, being L-shape d and extending out from the post to a pointdirectly over the saw. The rod is preferably made "of a square metal barwhich fits the socket in thepostj when the hood is in place on the saw.

Below the upper end of the bar at? it is reduced in size for somedistance, so when the bar is lifted, the reduced portion will come inthe socket and will enable the bar to be turned, The tube above thesocketis large enough to allow the square portion 7,

of the bar to turn and the reduced portion 7 is long enough to allowthis to be; done.

Thehood 8 is attached to the lower end ofthevertical rod 9, the upperend of the rod'being secured bya set screw 10, to the Y outenend oftherod 6. The rod 9 and the rod Gare rabbeted or otherwise interlocked, sothat when secured together they will al.-

ways take the same relative position", As,

here shown, the rod 9 contains a" rabbet on.

which is very little. Therod 9 isattached -TO prevent the teeth of thesaw coming in contact with the side of the hood, I secure,

on the inner side of the hood knobs or projections 11 which are adaptedto strike against the smooth face of thesaw, if the hook is swung to oneside sufliclently to hit the saw.

It sometimes happens that a board having passed the saw isthrown'ba'ckward and if the operator is reaching over from the front tothe rear of the saw to clear the board, as frequently happens, the handmay.

be drawn onto the saw. 1

To prevent this, I make use of a toothed pawl 12, which is pivoted tothe rear end of In'using the invention, the hood is sew cured normallyin place coveringjthe saw;

When it is desirable to remove the hood for any purpose, the set screw13 is released,

allowing therod'6 to be pushed up into the post 4 and turned around tobe out of the wa V l i still more room is desired on the table,

the rod 9 may be swung u into the position shown in dotted lines inig. 1. V

The first operation is done very quickly,

one hand manipulating the set screw and the other hand lifting ndturning the hood.

, The entire space above the saw is then free and can be used for sawingthe ends pieces that have to be held upright; 1 The operation of placingand displacing the hood is soreadily and quickly done that men will useit where they would not, if it was more complicated or required moretime. It'is to be notedthat by having the rod 6 exactl fit the socket inthe post 4, the hood will automatically drop into its exact osition whenit is lowered onto the saw. t will thus require no exact adjustmentlaterally and will never come in contact with the saw by reason ofbeing-out of position Vsidewise. It is only the vertical position thatthe operator has to look out for and this is adjusted according to thethickness of the stock which is being sawed.

' Indicating marks may be made on the rod 6, where it enters thepost 4to indicate the height of the hood when stock of different thicknessesis to be sawed. V V

I I claim; 7 r

1. In a guard for circular saws, the combination of a tubular dependentpost at one side of the saw, said post having an angular socket at. itslOWer end, an L-shaped rod having its upper end fitting said socket anda portion below saidend reduced in size and adapted to rotate in saidsocket, 'a hand clamp for clamping said rod in place in said post, avertical rod on'the end of said ,L

shaped rod and a hood on the lower end of said vertical rod adapted tocover the saw.

2. In a guard for circular saws, the'com- .bination of a tubulardependent post at one side of the saw, said 0st having an angular socketat its lower en an L shaped rod havclamp for clamping said rod in placein' said post, a vertical rod removably clamped 651 'ing its upper endfitting said socket and a i on the end of said L-shaped rod and a hood jed to cover the saw.

on the lower end of said vertical rod'adapt- 3. In a guard for circularsaws, the com:

bination of a'dependent post at one side of the plane of the saw, avertical rod slidably and'rotatably mountedin said post, a hand clampfor clamping said rod to thepost, a protecting hood for said saw and aconnecting'member by which said hood; is solely supported, said memberrigidly connecting said hood with the lower end of said rod, wherebysaid hood may belifted andswung laterally clear from said saw by 'asingle motion. 7 v r V 4:. In a guard for circular saws, the combinationof a dependent post at one side of 'the saw, a vertical rod slidably androtatably mounted on said post, a hand clamp for clamping said rod inposition on said its upper end cut'awa so as to be rotatable j in saidsocket, a hand c amp's'crewfor clamping said bar insaid post, ahandclamping screw in the lateral end of said 'L-shaped bar, 'a'squarevertical rod through the upper end of which said screw passes and whichis rotatable on said screw when the latter is loosened, a shoulder beingformed on saidvertical rod to prevent turnin when clamped in place anda'hood on the lower end of said vertical rod.

In testimony whereof'I have affixed signature. V

JOSEPH H. BURKE.

. 7 post, an offset member extending fromthe

